Sine plate angle wheel dresser



June 19, 1945. A. E. WISNE 2,378,743

SINE PLATE ANGLE WHEEL DRESSER Filed Aug. 9, 1945 2 Sheets-Sheet 1INVENTOR. ANTHONY E. WISNE His A7:T omveY June 19,1945. A. E. WlSNE2,378,743

SINE PLATE ANGLE WHEEL DRESSER Filed Aug 9, 1943 2 Sheets-Sheet 2INVENTOR. A NTH ONYEWIGNE HIS ATTORNE Y Patented June 19, 1945 SINEPLATE ANGLEWHEEL DRESSER Anthony Wisne, Det roit, Mich.

Application August 9, 1943, Serial No. 498,013

Claims. (01. 125-41) My invention pertains to improved angle determining devices for dressing wheels and for any or all other machinework.

It is an object of my invention to provide an improved angle measuringor determining device which may be'quickly andcOnveniently set tovarious angles, with improved accuracy, and

which is of a simple rugged construction. It is a further object of myinvention to provide an improved wheeldresser fordressing the cuttingsurfaces of abrasive wheels to various angles, which can be determinedquickly and conveniently with great accuracy, which will embody a ruggedand simple structure, and which will maintain its accurately determinedangle in use and operation. Further objects and advantages are withinthe scope of the invention, suchas relate to the arrangement, operationand function of the related elements of the structure, to variousdetails of construction and to combinations of parts, elements per se,and to economics of manufacture andnumerous other features as will beapparent from a consideration of the specification in conjunctionwiththe drawings disclosing specific embodiments of the invention, inwhich:

Fig. 1 is a side elevational View showing an angle determining and wheeldressing device in accordance with my invention;

Fig. 2 is a fragmentary sectional view taken on line 2-2 of Fig. l forshowing the adjustable mounting of the wheel dresser bracket;

Fig. 3 is a plan view showing my improved angle determining and wheeldressing device one edge of the sine plate being partially broken away;and

Fig. 4 is a diagrammatic view showing how the device is quickly set toaccurately determine the sine plate in a spaced apart parallel relation,

as by cap screws l9 passing upthrpugh the rolls into the sine plate, asshown. The base andthe sine plate. are heavy members of substantialthickness, preferably cast of any suitable metal,

to provide substantial strength and rigidity for accuracy. The upper andlower surfaces of the base and sine plate are planesurfaces, formed truein accordance with conventional practice, to

provide the degree of accuracy desired. Therolls are ofcylindricalconformation formed in accordance with usual practice toprovide the degree of accuracy required for the particular deviceanditsuses.

To facilitate computation of the anglesfrom the sines thereof, thedistance between the centers of, the spaced parallel rolls l5 and I! ispreferably selected to be an exact number of units of linearmeasurement, as five or ten inches for example, although it might bemade up in the metric system or other units, if desired. To center therolls accurately when these are clamped up to the under side of the sineplate l3, the latter is provided with accurate centering grooves 2| and.23 extending transversely in the under surface and these are so formedas to receive suitable portions of the two rolls so that a line throughthe centers of the rolls will be parallel to the upper surface of thesine plate so that ,work pieces or tools may be accurately supportedthereon, as by clamping screws (not shown) passing into threaded holes25 in thesineplate. As shown Fig. 1, the centering groove 2| on the lefthand side of the sine plate, is a cut out corner, while the other is agroove 23 cut in the bottom surface a distance from the end of thePlate.

As may be seen in Fig. 3, the sine plate I3 is preferably substantiallynarrower than. the base elongated roll are journalled snugly in bearingor swivel blocks 21 which, as shown in Fig. 1, are

set into sockets 29 in the base and aresecured therein, as by screws 3|passing up through the bottom. of the base. provided with a tension slot33 opening from the bearing aperture and providing suiiicient resiliencyso that by passing a clamping screw 35 through between the oppositesides of the slot the journalled ends of the roll may be clamped toeliminate slack motion and provide greater accuracy. The extreme lowerright-hand edge of the sine plate i3 is provided with a bevelled surface3'! to enable the sine plate to be tilted up to a greater angle thanwould be possible if it were a square corner.

As may be seen in Fig, l, a right angle sine plate orwheel dressersupport 39 of substantial strength and rigidity is provided as anintegral part of the same casting rising at right angles to the mainsine plate l3 directly above the cen-; ter of the elongated base roll lljournalled on the base. Rising from the upper edge of the right anglesine plat 39 is a bracket 4 l, which is square or some other noncircularcross-section, so that it is held from rotative movement as it isslidably moved up or down in a similarly shaped aperture 43 in thesupport. Passing transversely The swivel blocks 21 are through the upperend portion of the vertically adjustable bracket is a wheel dresserelement 45 secured therein, as by a screw 41, and carrying a diamond orsuitable point 49 for dressing a wheel. Also a horizontally disposedbracket of a square or other noncircular cross-section, is slidablymounted in a suitable similarly shaped guide groove 53 cut into theother side edge of the right angle sine plate 39 and secured therein asby a guide plate 55 secured by screws 51, as shown more clearly in Figs.1 and 2. Passing transversely through the projecting end of thehorizontal sliding bracket is a wheel dresser element 59 carrying awheel dressing point 6| and secured in the bracket, as by a screw 63,for dressing the surface of an abrasive wheel 65, represented by dottedlines. Handles 66 adjust the wheel dressers.

,In operation, asrepresented diagrammatically in; Fig. 4, the lower sineplate I3 and its right angle sine plate 39 are quickly, conveniently andaccurately tilted to any desired angles merely by inserting a suitablegauging member 67, or

thickness gauge, on the upper surface of the base plate -I I and underthe left-hand or sine roll 15. :The lower sine plate [3 is tiltedsufiicie'ntly to insert the gauge member El, and the roll 15 is thenlowered onto the [gauge member. The dimens-ion of the gauge member 61required to be a selected :for this purpose is conveniently determinablefrom the sine, or other function, of the desired angle or of.complementary angles, the dist-ance between the centers of the rolls l5and H being aiknown distance'and exactly an even number of units oflinear measurement. The routine is to look up the sine of the desiredangle on the sine table, or other functions of the desired orcomplementary angles from the sine, cosine or other mathematical tables.The known distance between the roll centers being L, and

the thickness of the gauge being G, sine of angle Wis G/L. Orsolving-for G equals Lx sine W. Having set the lower sine plateaccurately to a conveniently without the necessity of seeking, ormaking, an odd gauge member. Also I may provide a series of suchdown-set grooves 69 of var- I vtilting to any desired angle by insertinggauge means of known thickness between one of the rolls and said base, aright angle sine plate supported on said sine plate and extending atright angles thereto, wheel dresser means, and .slidable support meanscarried on said sine plate for supporting said wheel dresser meansextendably .for

dressing an abrasive wheel to form surfaces at accurately determinableangles. Y

, 2. A sine plate wheel dresser in accordance with claim 1, and furthercharacterized by said base having a downset surface offset a known odddistance from the main surface of the base for receiving gauging meansfor tilting the sine plate.

3. A sine plate angle wheel dresser having in combination, a base plate,a sine plate,-a pair of rolls of the same diameters, said rolls beingsecured to the underside in a parallel relation spaced apart.alknowndistance for tiltably supporting the sine plate upon'the baseplate, a right angle sine plate supported from said sine plate, wheeldressermeans, andislidable support means extendably supporting the wheeldresser means from the right angle sine plateso that wheels may bedressedat angles determined by inserting gauge members of knownthickness betweenone of said rolls and i said base plate.

- 4. .In a plane plate angle wheel dresser, a base I plate, asine plate,a pair of rolls disposed between desired angle, the wheel dresserelements may I then be moved along lines bearing a definite re--' lationthereto, for accurately dressing the faces of an abrasive wheel '65, asshown in Fig. 4. The wheel dressers may be moved along manually, in theslidable supports, or may be moved along y screws or other uniformdriving means,

as will be readily understood. Also the sine plate may be tilted tomeasure the angularity of a part or surface, and then the distancebetween the :sine 'roll andthe base plate may be measured by anysuitable gauge, and the angle may be computed. A wide variety of usesfor my improved sine plate, wheel dresser device, will be apparent formachine shops and similar worki Another feature of my improved angledetermining instrument is an ofi-set or down-set sur- @fa ue,represented by the dotted line 69 in Fig. 1;

This groove or recess 69 has a bottom surface downset a known amountbelow the upper surface of the .base plate for the reception of a gaugemember. The amount of downset is some odd measurement which is to beused frequently for some particular operation and which is notconveniently available in gauge members, so that by selecting a commonlyavailable gauge member and setting it down into the groove on thedownset surface, the necessary odd dimension is provided the base plateand the 'sine plate, securing means for securing saidrolls to theunderside of saidsine plate in a parallel relation and spaced apart aknown distance, a pair of parallel centering grooves in the undersideofsaid sine plate for receiving and holding said rolls parallel at saidknown distance center-to-center as the rolls are secured to the sineplate so that the insertion .of

. a .selected gauge of known thickness tilts the sine plate a knownangle, which is readily ascertainable, the ends of one of said rollsbeing extended beyond the marginal limits .of 'the sine plate, and saidbase plate having means for receiving and snugly journalling theextended ends of said one roll, a right angle sine plate extending fromthe first mentioned sine plate, wheel dresser means, support means onsaid right angle sine plate for slidably supporting said wheel dressermeans projecting extendably therefrom for dressing an abrasive wheel toform surfaces at accurately def terminable angles.

5. .A sine plateangle wheel dresser in accordi ance with claim 4 and.further characterized by,

said support means rising from said sine plate at right angles above theroll which is journalled to the base.

ANTHONY E. WISNE,

